createCanvas(1000,1000)

  background('lightgray')

  let turtleString = "B"

  for (let i = 0; i < 6; i++) {

    if (i < 5) {

      turtleString = turtleString.replaceAll("B","F[+B][B][-B]")

    } else {

      turtleString = turtleString.replaceAll("B","O")

    }

  }

  print(turtleString)

  stroke('black')

  // strokeWeight(8)

  translate(width/2, height)

  renderString(turtleString)

}

​

let branchLength = 300;

let angle = Math.PI / 6;

​

function renderString(string) {

  for (let character of string) {

    if (character == 'F') {

      let randomness = random(0.5,1.5);

      strokeWeight(branchLength/20)

      line(0, 0, 0, -branchLength*randomness);

      translate(0, -branchLength*randomness);

    } else if (character == '+') {

      rotate(angle*random(0.5,1.5));

    } else if (character == '-') {

      rotate(-angle*random(0.5,1.));

    } else if (character == '[') {

      branchLength /= 1.5;

      strokeWeight(branchLength/20)

      push();

    } else if (character == ']') {

      branchLength *= 1.5;

      strokeWeight(branchLength*20)

      pop();

    } else if (character == 'O') {

      fill('black')

      stroke('black')

      circle(0,0,20)

    }

  }

}